This article first appeared in the St. Louis Beacon: August 26, 2008 - This past week, we learned of two Manhattan high school students who, in a science project, gave us a glimpse of the future. They asked a simple question: "When you buy fish, do you get the kind of fish you think you are buying?"
Anyone who has bought fish at the market or ordered fish at a sushi restaurant knows the problem: In the store, one fish looks pretty much like another. In particular, some of the more trendy, tasty and expensive kinds of fish look a lot like cheaper substitutes. White tuna, for example, is difficult to distinguish in the store from farm-raised tilapia, although you pay a lot more for it.